Philosophical Experiments: Containing Useful, and Necessary Instructions for such as undertake long Voyages at Sea. Shewing how Sea-Water may be made Fresh and Wholsome: And how Freshwater may be preserv’d Sweet. How Biscuit, Corn, &c. may be secured from the Weevel, Meggots, and other Insects. And Flesh preserv’d in hot Climates, by Salting Animals whole. To which is added, An Account of several Experiments and Observations on Chalybeate or Steel-Waters: With some Attempts to convey them to distant Places, preserving their Virtue to a greater Degree than has hitherto been done. Likewise a Proposal for cleaning away Mud, &c. out of Rivers, Harbours, and Reservoirs. First edition. Printed for W. Innys and R. Manby, at the West End of St Paul’s; and T. Woodward, at the Half-Moon between the Temple-Gates, in Fleet-Street. London. 1739. Octavo. Half title; imprim. Hans Sloane Pr. Reg. Soc. dated March 29, 1739; Title; xxx, (1) errata; 163; engraved plate; (6) index; (2) printer’s catalogue. Later half calf, marbled boards, spine in six compartments with raised bands, gilt rules, leather label, gilt lettering. Renewed endpapers. Light marginal spotting to title page. Light smudge to p66. Faint signature of James Walford to the Dedication. Light marginal addenda to p. 98 as per errata in the same contemporary hand. A crisp, handsome and bright copy. Stephen Hales (1677-1761) FRS, Royal Academy of Sciences. This volume was published at the expense of the Royal Society, and for which he received the Copley Medal for outstanding achievements in this research.